 The presidential debate is set for tonight in Atlanta. ABC's Stephen Portnoy has more on some of the rules. The two lecterns are spaced just eight feet apart. The 90-minute debate will feature two commercial breaks. No staffers will be allowed on stage. A two-minute answer to each question will be followed by a one-minute rebuttal, and then a response to that rebuttal. CNN has agreed to mute the microphone of the candidate who isn't recognized to speak. By a coin toss, it's been determined that Biden will give the first two-minute closing statement, and Trump will have the last word.